The Dragon King.
A carp could transform into a dragon if it successfully jumps over the Dragon Gate. On day, the carp-turned dragon was hovering over a pool, he missed his former life as a fish, and he thought that a bath in its cool waters would be delicious, so he changed himself back into a carp. The result was delightful, until he found himself hooked up by a fisherman on to the bank. His spirit flew straightway to the Supreme God, and demanded a redress of grievances. The Supreme Deity merely remarked that fishermen would catch fish; and if he valued his dragonship so lightly as to return to the carp condition, he must expect to be caught.